:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1f2b;
  --muted: #5a6372;
  --accent: #0f9b6a;
  --border: #e4e7ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1217;
    --fg: #e6e9ef;
    --muted: #9aa3b2;
    --accent: #2ed08d;
    --border: #2a2f3a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 24px 64px; }
header { margin-bottom: 32px; }
header nav { margin-top: 14px; font-size: 14px; }
header nav a { margin-right: 16px; color: var(--muted); }
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-name { font-size: 28px; font-weight: 700; letter-spacing: -0.01em; }
.brand-name a { color: inherit; }
.brand-sub { font-size: 14px; color: var(--muted); }
h1 { font-size: 22px; margin: 28px 0 10px; font-weight: 600; }
h2 { font-size: 17px; margin: 22px 0 8px; font-weight: 600; }
p { margin: 0 0 14px; color: var(--fg); }
p.muted, .muted { color: var(--muted); font-size: 14px; }
ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.92em; background: var(--border); padding: 1px 6px; border-radius: 4px; }
.card { border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px; margin: 18px 0; }
footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }
.updated { color: var(--muted); font-size: 13px; margin-top: -4px; }